Brocade Virtual ADX Global Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 181)

Brocade Virtual ADX Global Server Load Balancing Guide 171
53-1003245-01
Displaying GSLB for IPv6 configurations
2
Use the show gslb dns command to view information about the distribution of traffic after the
configuration of weighted IP metrics.
The command can be used with or without the zone-name variable, which specifies a single zone. If
this variable is omitted, all zones are displayed.
Virtual ADX(config)#show gslb dns zone brocade.com
ZONE: brocade.com
HOST: www:
(Global GSLB policy)
GSLB affinity group: global
Flashback DNS resp.
delay selection
(x100us) counters
TCP APP Count (%)
* 2001:db8:abc: cfg v-ip ACTIVE N-AM 0 0 1 (33%)
* 2001:db8::def: cfg v-ip ACTIVE N-AM 0 0 1 (33%)
* 2001:db8::1: cfg v-ip ACTIVE N-AM 0 0 1 (33%)
* 2001:db8::5: cfg real-ip DOWN N-AM -- -- 0 (0%)
In the example above, the GSLB controller learned about all the IP addresses associated with the
zone brocade.com from the IP list; thus, the source for each is listed as ¡§cfg¡¨. Traffic has been
evenly distributed across the three active IP addresses.
Location The geographic location of the server. The location is based on the IP
address and can be one of the following:
•
ASIA
•
EUROPE
•
N-AM : North America
•
S-AM : South America
The GSLB Brocade Virtual ADX can use this information when comparing
the servers in order to select the “best” ones for the client. The GSLB
Brocade Virtual ADX prefers servers within the client’s geographic region
over servers in other geographic regions.
FlashBack Delay (x100us) The round-trip time for a health check sent by the GSLB Brocade Virtual
ADX to the host application on the server.
The GSLB Brocade Virtual ADX can use this information when comparing
the servers in order to select the “best” ones for the client. The GSLB
Brocade Virtual ADX prefers servers with lower round-trip times to those
with higher round-trip times.
The value in the TCP column indicates the round-trip time of the Layer 4
health check to the TCP port.
The value in the App column indicates the round-trip time for the Layer 7
health check.
NOTE: A single value is displayed even if the zone has multiple host
applications. If the FlashBack values (round-trip times) differ, the
slowest times are displayed.
DNS resp. selection counters Count The number of times the GSLB Brocade Virtual ADX has selected this
server as the “best” server and thus placed the server’s IP address at
the top of the list in DNS replies.
DNS resp. selection percentage (%) The percentage of times the GSLB Brocade Virtual ADX has selected this
server as the “best” server and thus placed the server’s IP address at
the top of the list in DNS replies.
TABLE 18 GSLB zone and host application information (Continued)
Field Description